摘要
针对5A06铝合金梨形六通件的结构特点,提出多道次旋压复合成形的试验方案,并设计了旋压及翻孔工装,采用"筒形件旋压+反锥渐进旋压+收口旋压+翻孔成形"工艺,实现了零件的整体成形。为满足零件壁厚最小的要求,筒形件旋压采用"普旋+强旋"相结合的方式,收口采用往返程交替旋压方式,并研究分析了热处理及旋压温度对成形的影响。在旋压过程中,零件容易产生纵向、横向裂纹及边缘波纹,这些缺陷与旋压温度、退火道次有很大关系。试验表明:旋压温度为300~320℃时,设置两次去应力退火后,翻孔后零件的最大减薄量达到最低的48.3%,同时消除了起皱、开裂等缺陷,零件的成形效果较好。
For the structure characteristic of pear-shaped six-way part for 5 A06 aluminum alloy,a test plan for multi-pass spinning compound forming was proposed,and the spinning and hole flanging tools were designed.Then,the process of‘spinning of cylindrical part+progressive spinning of reverse cone+closing spinning+hole flanging’was adopted to realize the integral forming of part.In order to meet the minimum wall thickness requirement of part,the combination of conventional and power spinning was adopted in the spinning of cylindrical part,the back and forth alternate spinning was adopted in closing,and the influences of heat treatment and spinning temperature on the forming were studied and analyzed.In addition,in the spinning process,the parts were prone to longitudinal and transverse cracks and edge wrinkle,which were closely related to the spinning temperature and times of annealing.The results show that when the spinning temperature reaches 300-320℃,after two times of stress relief annealing,the maximum thinning of part after hole flanging reaches the lowest which is 48.3%,and the whole forming effect is good without wrinkle,crack and other defects.
作者
冯苏乐
王业伟
沈宏华
陈莎莎
张建利
杨学勤
Feng Sule;Wang Yewei;Shen Honghua;Chen Shasha;Zhang Jianli;Yang Xueqin(Shanghai Aerospace Research Institute of Precision Machinery,Shanghai 201600,China;Okey Machine Company Limited,Suzhou 215500,China)
出处
《锻压技术》
CAS
CSCD
北大核心
2020年第11期94-100,共7页
Forging & Stamping Technology
基金
中国航天科技集团有限公司第八研究院工艺技术研究项目(718-MY-01)。
关键词
梨形六通件
渐进成形
翻孔
旋压温度
退火
pear-shaped six-way parts
progressive forming
hole flanging
spinning temperature
annealing
